Improvement in reciprocating paper-cutters



THOMAS E. DOOLEY, OF BOSTON,

MASSACHUSETTS.

IMPROVEMENT IN RECIPROCATING PAPER-CUTTERS.

Specification forming part of Letters Patent No. 75,278, dated June 6, 1876; application filed April 30, 1875.

To all whom it may concern:

Be it known that I, TuoMAs BROWN Doo- LEY, of Boston, in the county of Suffolk and State oi' l\/Ia-ssachusetts, have invented a new and Improved Paper-Cutter, of which the following is aspecification, reference being had to the drawings annexed.

The nature of my invention is that of a machine with a frame and with a raised platform, on which bundles of paper may be placed, the

frame having a cutting-blade which lifts and lowers in a peculiar manner; a device for insuring the even bearing of the bladeedge; also, a device for preventing a jar or concussion of the blade in itsdescent, and certain attachments of cog-wheels, shafts, &c., by which motion is communicated to the machine; also, a gage to govern the length to which the bundles of paper are to be cut; and the object of the whole is to cut smoothly the edges of bundles of paper sheets.

Figure l is a view of the machine from the front side. Fig. 2 is a view of it from the rear side. Fig. 3 is a view of a part of the device,

hereinafter explained. Fig. 4 is a top view of the compound gage, as hereinafter explained. In the drawings, A A Figs. 1 and 2, are two upright slabs of metal, called the standards. These are cut away to diminish their weight in any convenient manner. 1 and 2, is a bar of metal, passing standard to the other, horizontally, at a slight distance from their lower ends, which bar or brace is called the lowerbrace, and secures the two standards to each other. 0, Figs. 1 and 2, is a horizontal platform or table, passing from one standard to the other, and firmly secured to the same. D, Figs. 1 and 2, is the upper brace, being a slab of metal of shape as seen in the drawings, which passes from and over the top of one standard to that of the other, and is firmly fastened to both. From the upper brace D to the table 0 the two standards A A are slotted, and passing through these slots, and projecting on each side of the machine beyond the standards, is the knife-bar E, Figs. 1 and 2, which bears the knife F, a strip of steel sharpened at the lower edge, and screwed onto the knife-bar.- (See Fig. 1.) This knifebar is borne by two pins, G G", Fig.2, of peculiar construction.

B, Figs. from one (I sometimes put rollers on these pins.) They pass at one end (the hither end in Fig. 1) into the knife-bar, by which they are held and in which they may be rotated, and at the other end project (see Fig.2) into, respectively, a diagonally-cut slot (seen entirely in Fig. 2 and partially in Fig. l) in a slab of metal, H, Figs. 1 and 2, called the slot-bar, which bar passes across the machinejust under the upper brace D, from one standard to the other, and is fastened to them by its ends. These pins, at the ends at which they enter the knife-bar, are turned off to a smaller diameter, the cylinder thus formed being not concentric with the larger portion of the pin. (See Fig. 3.) Thus, as the pins respectively rotate wholly or partially upon that part of them which enters into the knife-bar, the parts of (in vertical section) the periphery of the rest of the pin-in other words, of that portion which enters into the slot of the sl0t-barim1:)inge in succession on the lower or hearing sides, respectively, of the slots, each pin thus respectively, as it is rotated, lifting or lowering, as desired, that end of the knife-bar and knife at which it is situated. v

A'set-screw to each pin in the upper edge of the knife-bar (see J J", Fig. 1) retains the pin in the position in which it may be set. K K", Figs. 1 and 2, are the buffer-rods, being two rods passing diagonallythrough the upper brace D down to the knife-bar E, to the upper edge of which they are, respectively, fastened. These buffer-rods run in a direction parallel with the slots in the slot-bar El, and bear, respectively, at their top ends a perforated disk of rubber, L L"- Sometimes I use a metallic spring instead. These disks are held in place on the rods by a nut, as seen in the drawings. At the places where the buffer-rods pass through the upper brace I) there are, respectively, on the upper side of the brace, projections of shape as seen in the drawings, whose upper surfaces, where the rods pass through them, are, as seen, at right angles to the axis of the rods, a plane-surfaced rest being thus afforded to the springs L L The knife-bar E is hollow, being in the shape of two slabs of metal, (forming the sides,) placed side by side at a short distance from each other, and a narrow piece, respectively, fastened to them at flange, (see Fig. 1,)

the top and at the bottom, the ends being open. From one end (see Fig. 2) projects the wheel-bar M, Fig. 2, which is hung at its upper end inside of the knife-bar, and'at its lower end is connected with a short rod, which passes horizontally from one to the other of two cog-wheels, N, Fig. 1, N Fig. 2, placed side by side, and borne by a shaft, which shaft is held by two projections, ,P, Fig. 2, P", Fig. 1, one of which is seen in both drawings, from the outside of the standard A. These cogwheels gear, respectively, each one in one of a pair of smaller cog-wheels, (see one in Fig. 2, marked Q, in dashed lines,) which pair are also borne by the same projections. The two shafts which bear, respectively, these two pairs of cog-wheels are held, respectively, by a box, (see two of them in Fig. 2 and one in Fig. 1,) which slides up and down in a perpendicular slot in the projections P P", and the boxes are raised or lowered at will by the screws seen in the drawings. Upon the shaft which bears the lower pair of cog-wheels Q, Fig. 2, is borne a bevel-wheel, 1%, Fig. 1, which is rotated by a smaller bevel-wheel, S, Fig. l, borne upon a shaft, T, Fig. 1, which passes. beneath the platform C to the other side of the machine, to the outside of the standard A", where it carries a fly-wheel, U, Figs. 1 and 2, which is provided with a handle,W, by which motion is communicated and the machine is put into operation.

V V", Figs. 1 and 4, is the gage or compound gage, which is composed of two slabs of metal, each respectively bent at right angles, the horizontal portion of each lying upon the table 0, which table bears a groove, (seen in Fig. 1,) running at right angles to the knifebar. Into thisgroove projects downward a fastened to the lower surface of the right-hand gageV", the gages (being connected together) thus sliding back and forward in the direction in which the groove runs. The inner edges of these gages touch each other, and are held together by a screw with a handle, as seen in the figures. Another screw, whose handle is seen in Fig. 1, and its top in Fig. 4, holds the left-hand gage Vf, and with it the other gage, V, firmly to the table when the machine is in operation.

When the machine and its table are large, I sometimes use more than two divisions of the compound gage.

A strip of metal, Z, Fig. 4, called the gage side-rest, is placed and held by the screw between the two divisions of the gage, affording a rest for the side of the bundle of paper. The notches seen are thus cut to afford a passage for the screw.

Operation: The knife and knife-bar being ,thrown up as far as it will go by means of the rotation of the wheel U, the bundle of paper 1 to be out or trimmed is placed upon the plat form, a portion ofthe edge of the bundle whichit is intended to trim off being allowed to project beyond the line of descent of the knife, the distance to which it is allowed to project being governed by the position of the gages VV". When two bundles are to be cut of different lengths, one of the gages is advanced farther than the other, as seen in Fig. 4. I sometimes dispense with the knifebar E. The wheel U being then, by means of the handle W, rotated, the bevel-wheels S and R are also rotated, thus rotating the cogwheels Q and the cog-wheels N N*, when, by

means of the wheel-bar M, the knife-bar E, with the knife F, is drawn to the right in Fig. 1, when the pins G GX, sliding in the diagonal slots in the slot-bar, cause the downward motion communicated to the knife-bar and knife to take a diagonal direction, and the cut given by the knife to the bundle of paper to be a drawing cut. When the knife has reached the end of its out the buffer-rods K K have been drawn down, as seen in Fig. 1, when the buffers L L, impinging upon the projections on the upper brace D, through which the buffer-rods run, prevent tbeforcible striking of the knife F upon the table 0, and the consequent dulling of the knife.

In grinding the blades when theyhave become dull it is often the case that one end is more ground away than the other, in which case, with other paper-cutters, the knife does not strike square upon the platform. With my device, as above described, by the turning of either of the pins G G (see Fig. 3,) one end or the other of the knife-bar and knife is raised or lowered, as may be required, thus completely obviating the disadvantage as to the grinding heretofore experienced.

I do not claim the use of diagonal slots for the purpose of giving the knife-bar or knife a drawing cut.

I claim in paper-cutting machines 1. The slotted bar H, in combination with the knife F, the pins Gr GR, the standards A A", the braces D and B, and the table (J, all

when constructed and arranged substantially as described.

2. The pins G G", having eccentric sleeves or collars,in combination with the slotted bar H and the knife F, the standards A A*, braces D and B, and table 0, all constructed and arranged substantially as described.

3. The buffer-rods K K" and the buffers L L*, in combination with the knife F, the slotbar H and its slots, the standards A A", the table (J, and the upper brace D, all constructed and arranged substantially as described.

4. The compound gage V V3, in combination with the table 0 and the knife F, the gage side-rest Z, and the necessary apparatus to support the knife and table and to actuate the knife, all constructed and arranged substantially as described.

THOMAS BRO WN DOOLEY.

Witnesses:

LEMUEL P. J ENKS, JEROME DAVIS. 

